Introduction to custom membershipprovider.

Namespace: system. Web. Security;

Membership is a static class built in vs DOTNET 2005. It is used for member Qualification Verification and operations.
It does not provide direct data operations, but is done by its provider.

// Membership class
// (From within. NET Framework 2.0Code)
Private Static membershipprovider s_provider;

Here we can see that membership defines a local static object s_provider, which is of the membershipprovider type.

To enable membership provisionProgramYou must create a class that inherits the abstract class of membershipprovider.
The attributes and methods required for the implementation of the membershipprovider abstract class, and descriptions of each attribute and method are provided.

// This is a piece of information in the machine. config configuration file.

<Membership>
<Providers>
<Add name = "aspnetsqlmembershipprovider"
Type = "system. Web. Security. sqlmembershipprovider,
System. Web,
Version = 2.0.0.0,
Culture = neutral,
Publickeytoken = b03f5f7f11d50a3a"
Connectionstringname = "localsqlserver"
Enablepasswordretrieval = "false"
Enablepasswordreset = "true"
Requiresquestionandanswer = "true"
Applicationname = "/"
Requiresuniqueemail = "false"
Passwordformat = "hashed"
Maxinvalidpasswordattempts = "5"
Minrequiredpasswordlength = "7"
Minrequirednonalphanumericcharacters = "1"
Passwordattemptwindow = "10"
Passwordstrengthregularexpression = ""/>
</Providers>
</Membership>

It indicates that the sqlmembershipprovider class is called as the s_provider object in membership.
Because membership will read this configuration information during initialize () and instantiate it.

// Code in the initialize () method
// (From the internal code of. NET Framework 2.0)
Membership. s_provider = membership. s_providers [section1.defaprovider provider];

S_providers is all instances in the <providers> section of all configuration files.
Section1.defaprovider provider is the defaultprovider attribute value of <membership>,
If it is not defined, use the internal default value aspnetsqlmembershipprovider, which is defined by the feature.

// Defaultprovider definition in the membershipsection class
// (From the internal code of. NET Framework 2.0)
[Configurationproperty ("defaultprovider ",
Defaultvalue = "aspnetsqlmembershipprovider "),
Stringvalidator (minlength = 1)]
Public String defaultprovider

So far, will you understand it?

// Sqlmembershipprovider Definition
// (From the internal code of. NET Framework 2.0)
Public class sqlmembershipprovider: membershipprovider

From this we can see that sqlmembershipprovider inherits the membershipprovider class.

If the following section is defined in Web. config in our system:

<Membership defaultprovider = "myprovider" userisonlinetimewindow = "15">
<Providers>
<Add
Name = "myprovider"
Type = "EOS. Web. Security. membershipeosprovider"
Connectionstringname = "localsqlserver"
Enablepasswordretrieval = "true"
Enablepasswordreset = "true"
Requiresquestionandanswer = "true"
Writeexceptionstoeventlog = "true"/>
</Providers>
</Membership>

// Sqlmembershipprovider Definition
// (From the internal code of. NET Framework 2.0)
Public sealed class membershipeosprovider: membershipprovider

note that defaultprovider = "myprovider" is defined here to indicate that membership defaults myprovider to s_provider object.
while myprovider is the EOS. Web. Security. membershipeosprovider class. It also inherits the membershipprovider class.